Concealed hinge



June 19, 1934. c. T. JOHNSON CONCEALED HINGE IHIS Filed June 12, 1933 lv II. I' I III- Patented June 19, 1934 UNITED: STATES CONCEALED HINGEConrad T. Johnson, Jamestown, N. Y.

Application June 12, 1933, Serial No. 675,470

2 Claims.

This invention relates to a concealed hinge capable of general use butparticularly adapted for swinging doors or windows of houses, ofiices,garages, vaults and the like and aims to provide l3v a novelinstallation having the joined portions of the leaves substantiallyhook-shaped for maximum strength, rigidity and service, especially inthe case of heavy doors or windows.

A particular aim is to provide such a concealed l hinge in which themoving part will not contact with or mar the adjacent edge or corner ofthe door jamb and will permit opening to the same extent as an ordinaryhinge.

In addition, an object is to produce such a hinge 1.5 as may beexpeditiously and inexpensively stamped and in which the leaves aresubstantially similar, each having walls at a right angle to each otherconnected by an arch or bow, with the pivotal axis disposed inwardly ofthe intersecting planes of said walls and between such planes and saidarch.

Various additional objects and advantages will become apparent from aconsideration of the description following taken in connection with the.5 accompanying drawing illustrating one embodiment thereof, andwherein:

Figure l is a fragmentary perspective view of a closed door pivoted to ajamb by means of hinges constructed in accordance with the invention;

Figure 2 is a horizontal sectional view through said door, jamb and ahinge, the door being open to the extent of 90;

Figure 3 is a sectional view similar to Figure 2 showing the door in athree quarter open position;

Figure 4 is a sectional view similar to Figure 2 showing the door fullyopen, or to the extent of 180;

Figure 5 is a fragmentary elevation of the parts of Figures 2 to 4, thedoor being open as in Figure 4 and looking toward the hinge-mountingwall of the jamb;

Figure 6 is a perspective view of the novel hinge open to the extent of90, and

Figure '7 is a perspective View of an offset mounting bar for the hinge.

Referring specifically to the drawing wherein like reference charactersdesignate like or corresponding parts throughout the different views,numerals 8 designate hinges constructed in accordance with theinvention. Each hinge 8 has substantially similar leaves 9 and 10provided with flat attaching portions 11 and 11 arched portions 12 and12*, respectively, and fiat portions 13 and 13 respectively, at rightangles to and returned toward the portions 11 and 11, respectively. Saidportions or walls 13 and 13 are terminally curled into interfitting eyes14 and 14 respectively, in which a pintle 15 is disposed on to pivotallyconnect them. It willbe particularly noted that the axis of said pintle15 is spaced inwardly from the intersecting planes passing through theportions 11 and 11 and 13 and 13.

By way of example, a pair of said hinges 8 are 5 shown in connectionwith a door 1'? and jamb l8 of metal, although obviously similar partsof Wood may be used. Said jamb 18 has a door stop 19 and the usual hingeslots 20 in which the leaves 9 are disposed with their walls 13 abutting7 the adjacent surface of the inner side wall of the jamb, the wall 11remaining flush with the outer surface of the jamb and the axis of thehinge beinglocated within the confines of the I jamb adjacent the insidecorner as best shown in Figures 2 to 4.

The attaching walls 11 are fixed in slots 21 of the door flush with theback edge of the door.

Bars 22, with or without an offset 23, according to the thickness ofattaching portions 11 and so 11 are spot welded as at 24 and 24: to thein- 1 ner surface of the jamb 18 and the door, screws 25 and 25 beingpassed through the holes 26 and 26 of the portions 11 and 11 and screwthreaded in holes 2'7 of said bars 22. In the case 5 of door 17, areinforcing channel 28 is preferably first spot welded into the doorjamb and the hinge bar 22 then spot welded to the channel.

The hinge as shown in Figures 2 and 3, opens to the same extent as an.ordinary hinge or to 9 any intermediate degree and there is no contactof the leaf 10 incidental to movement, with the adjacent corner or edgeof the jamb.

It will be observed that the pintle is so located that it is practicallyimpossible to remove it without first removing the entire hinge, thusguarding against tampering with a view to removing the pintle and thenremoving the door, for criminal purposes.

When desired, the hinge may be equipped with ball bearings for freeaction, as where heavy doors are used in connection with door closers.

Various changes may be resorted to provided they fall within the spiritand scope of the invention as defined by the appended claims.

I claim as my invention: 1

1. A hinge comprising leaves adapted for substantially paralleldisposition in closedcondition, each leaf having an attaching portion,an arch portion extending therefrom and a portion re 1 turned from thearch portion toward the plane of the attaching portion and terminallyspaced from the junction of the attaching portion and arch portion, andpivot means connecting the longitudinal terminals of the third mentionedportions together, the attaching portion of each leaf being spaced fromthe pivot means by the arch portion and returned portion of the sameleaf, said means being spaced from the arch portion and surrounded bythe arch portion and the intersecing planes of the attaching portion andthird mentioned portion.

CONRAD T. JOHNSON.

